Securing system for securing a helmet and helmet having a  securing system of this type

ABSTRACT

A securing system for a helmet has a forehead band having two guiding installations and two neck band portions having in each case one counter guiding installation that corresponds to one of the two guiding installations of the forehead band. Each of the counter-guiding installations for repositioning the respective neck band portion in relation to the forehead band is disposed so as to be displaceable on the corresponding guiding installation.

CROSS-REFERENCES TO RELATED APPLICATIONS

This application claims the priority of German Patent Application, Serial No. 10 2018 205 080.5, Apr. 4, 2018, pursuant to 35 U.S.C. 119(a)-(d), the content of which is incorporated herein by reference in its entirety as if fully set forth herein.

FIELD OF THE INVENTION

The invention relates to a securing system for securing a helmet on the head of a helmet wearer. The invention moreover relates to a helmet, in particular an occupational safety helmet, for protecting the head of the helmet wearer, having a securing system of this type.

BACKGROUND OF THE INVENTION

In the case of helmets, in particular in the case of occupational safety helmets, a reliable fit of the helmet on the head of the helmet wearer is very important in order for the full protective effect to develop. It is known for a headband which to a certain degree is adaptable to the head shape of the helmet wearer to be provided for securing the helmet shell. Exemplary headbands are disclosed in publications JP 2013 102 839 A, U.S. Pat. No. 4,051,555 A, GB 2 098 459 A, DE 203 12 928 U1, EP 2 046 156 B1, EP 2 123 182 B1, US 2017/0 112 221 A1, and DE 10 2010 027 014 A1.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide an improved securing system for securing a helmet on the head of a helmet wearer. The securing system is intended to be adaptable particularly in a flexible and precise manner to the head shape of the helmet wearer, and to guarantee a stable fit of the helmet.

This object is achieved by a securing system for securing a helmet on the head of a helmet wearer, having

-   -   a forehead band having two guiding installations; and     -   two neck band portions having in each case one counter-guiding         installation that corresponds to one of the two guiding         installations of the forehead band,

wherein each counter-guiding installation for repositioning the respective neck band portion in relation to the forehead band is disposed so as to be displaceable on the corresponding guiding installation

wherein the guiding installations are in each case disposed on a free end of a respective forehead band lever arm, wherein the forehead band lever arm, as a component part of the forehead band, extends in the direction of the respective neck band portion beyond a pivot axis about which the respective neck band portion is pivotable in relation to the forehead band,

wherein the guiding installations are spaced apart from the pivot axis in a manner perpendicular to the longitudinal direction of the forehead band.

The securing system has a forehead band having two guiding installations and two neck band portions having in each case one counter-guiding installation that corresponds to one of the two guiding installations of the forehead band. Each counter-guiding installation for repositioning the respective neck band portion in relation to the forehead band is disposed so as to be displaceable on the corresponding guiding installation. The guiding installations and the corresponding counter-guiding installations form in particular in each case one linear guide. A linear guide hereunder is to be understood to be a guide along a straight or curved displacement path. Linear guides along curved displacement path are also referred to as arcuate guides. The linear guides enable precise and flexible repositioning of the respective neck band portions in relation to the forehead band. The securing system is adaptable in a simple and precise manner to the head shape of the helmet wearer. The helmet fits securely and can develop the full protective effect thereof in a reliable manner The securing system is in particular conceived for use in an occupational safety helmet having a preferably unpadded helmet shell.

It is moreover advantageous that linear guides have few parts that are movable relative to one another. The neck band portions are connectable in a stable manner to the forehead band by means of the respective linear guide. The production of the securing system is simplified, and the service life of said securing system is increased.

The forehead band has a longitudinal direction. The longitudinal direction of the forehead band in the case of a worn helmet corresponds substantially to the circumferential direction of the head of the wearer. The longitudinal direction of the forehead band in a state of the securing system assembled on the helmet runs at least substantially in one plane. Said plane hereunder is also referred to as the forehead band plane.

In the securing system according to the invention the guiding installations are in each case disposed on a free end of a respective forehead band lever arm, wherein the forehead band lever arm, as a component part of the fore head band, extends in the direction of the respective neck band portion beyond a pivot axis about which the respective neck band portion is pivotable in relation to the forehead band. This guarantees a simple repositioning capability of the neck band portions and a reliable fit of the helmet. The guiding installations are spaced apart from the pivot axis on account of the forehead band lever arms. The lever effect resulting therefrom has the effect of smooth and simultaneously precise pivoting of the neck band portions about the respective pivot axis. The guiding installations along the longitudinal direction, in the direction of the neck band portions, that is to say towards the rear, are mounted so as to be spaced apart beyond the pivot axis. The pivoting mechanism does not have any disturbing influence on the helmet wearer. Moreover, the headband extends at least in portions along the occiput, on account of which the fit of the helmet is further improved.

In the securing system according to the invention the guiding installations are spaced apart from the pivot axis in a manner perpendicular to the longitudinal direction of the forehead band. This enables the neck band portions to be pivoted without impediment in relation to the forehead band. Catching of the neck band portions on the respective guiding installation when pivoting is avoided.

The repositioning of the neck band portions in relation to the forehead band can comprise a translatory and/or a rotary component. The repositioning can in particular cause a movement of the neck band in a manner perpendicular to the forehead band plane. According to the invention, the neck band portions in the repositioning are particularly preferably pivoted relative to the forehead band.

The neck band portions are preferably able to be fastened not directly to a helmet shell of the helmet, but only by way of the forehead band. This guarantees independent, flexible pivoting of the neck band portions. The adjustment possibilities to the head shape of the helmet wearer are improved. A secure fit of the helmet is also guaranteed without a chin band.

The neck band portions can be fixedly or releasably connected to a neck band. The neck band portions are preferably connected so as to be variable in length. To this end, known locking or adjustment systems, respectively, for adapting an effective length of the neck band, and in particular an effective circumference of the securing system to the head circumference of the helmet wearer, can be provided.

The neck band portions can in each case have two elbow bends which are curved counter to one another. A substantially elbowed (that is to say an angled or deflected) profile of the neck band portions improves the ergonomic adaptability of the securing system to the occiput of the helmet wearer.

A securing system according to the invention enables simple and effective repositioning of the neck band portions in relation to the forehead band. Both of the guiding installations are preferably displaceable by a respective displacement path relative to the corresponding counter-guiding installation, said displacement path extending at least in regions so as to be perpendicular to the longitudinal direction of the forehead band.

A displacement path running perpendicularly to the longitudinal direction of the forehead band simplifies the repositioning of the neck band portions out of the forehead band plane. The adaptability to the head shape of the helmet wearer is further improved.

A securing system according to the invention preferably has a defined pivot axis about which the at least one neck band portion is pivotable in relation to the forehead band. The repositioning of the neck band portion takes place by precise pivoting about the defined pivot axis. The respective pivot axis preferably lies in the forehead band plane. Both guiding installations are preferably displaceable relative to the corresponding counter-guiding installation along the respective displacement path, wherein the displacement paths run in each case at least in regions along an arc. The respective displacement paths particularly preferably run completely along an arc.

A securing system according to the invention preferably has an unequivocally established pivot axis about which at least one of the two neck band portions is pivotable. Both neck band portions are preferably connected to the forehead band by way of in each case one articulated bearing. The respective neck band portion is connected to the forehead band by way of the articulated bearing in addition to the linear guide. The neck band portion is mounted in a stable manner and is precisely guided when pivoting.

The connection by way of the articulated bearing can in particular be releasable. The articulated bearing is preferably embodied as an encapsulated-pin articulated bearing. An articulation pin can be molded so as to be integral to the forehead band, for example. The corresponding articulation capsule can be configured as a clearance in the respective neck band portion that is adapted to the articulation pin. Encapsulated-pin articulated bearings are simple and stable in terms of construction.

In a securing system according to the invention the respective neck band portion is readily pivotable. Both neck band portions are preferably connected to the forehead band by way of an articulated bearing, wherein the articulated bearing is in each case disposed on a free band end of the respective neck band portion that faces the forehead band. All pivotal parts are disposed in the region of the rear side of the securing system, thus in the region of the occiput of the helmet wearer. The pivoting mechanism does not impede the helmet wearer and the fit of the helmet.

A securing system according to the invention has a defined maximum pivotability of the respective neck band portion in terms of the forehead band. Both neck band portions preferably have in each case one delimination protrusion in the region of the articulated bearing, wherein each delimitation protrusion is disposed between two detent elements that are configured on the forehead band. An inwardly pivoted terminal position, or an outwardly pivoted terminal position, respectively, of the respective neck band portion is precisely established on account of the delimitation protrusion impacting on one of the detent elements. Additionally, delimitation elements which delimit maximum pivoting can be configured by the guiding installations and the corresponding counter-guiding devices.

A securing system according to the invention guarantees the establishment of various pivoted positions. Any unintentional variation of the pivoted position is avoided. A reliable fit of the helmet on the head of the helmet wearer is guaranteed. The counter-latching elements can in particular be embodied as latching cams which engage in latching receptacles of the guiding installations. Both guiding installations and both counter-guiding installations preferably have corresponding latching elements or counter-latching elements, respectively.

The pivot axis can preferably be established on account of the articulated connection between the neck band portions and the forehead band, as described above. In this case, one neck band lever arm can be provided for each neck band portion, said neck band lever arm corresponding to the respective forehead band lever arm and extending from the pivot axis toward the rear. In the case of an elbowed profile of the neck band portions, the neck band lever arm can extend up to a first elbowed bend of the neck band, for example. In the case of an in particular double-elbowed profile of the neck band portion, having a first and a second elbow bend as well as an intervening elbowed portion, the counter-guiding installation is preferably molded in the region of the elbowed portion, between the two elbowed bends, and projects therefrom.

A securing system according to the invention can be fastened in a stable and reliable manner to the helmet shell. One anchoring element for fastening the securing system to the helmet shell is in each case preferably disposed on the free ends of both forehead band lever arms. One or a plurality of anchoring elements can additionally be disposed on the forehead band in such a manner that fastening of the forehead band is also possible in the region of the front side of the helmet shell.

The guiding installations are preferably spaced apart from the pivot axis in the direction of the helmet shell, that is to say upward when the helmet is worn. This enables the neck band portions to be in particular completely pivoted into the helmet shell. In particular, the parts of the neck band that are disposed on the rear side of the helmet are able to be stored within the helmet shell. This enables the helmets to be easily stacked.

The disposal of the guiding installations so as to be spaced apart from the pivot axis in a manner perpendicular to the longitudinal direction can be effected by forehead band guiding legs. The forehead band guiding legs are in particular disposed on ends of the forehead band lever arms that are opposite the respective pivot axis. The forehead band guiding legs preferably extend in the direction of the helmet shell.

A securing system according to the invention has a high stability and is able to be manufactured in a simple and cost-effective manner The guiding installations are preferably embodied so as to be integral to the forehead band, and the counter-guiding installations are also preferably embodied so as to be integral to the respective neck band portions. Particularly preferably, all components of the forehead band, such as for example the forehead band lever arms and forehead band guiding legs, are embodied so as to be integral to the forehead band. The forehead band and the neck band portions are made from plastics material, for example.

A securing system according to the invention is simple and stable in terms of construction. Both guiding installations preferably have in each case one guiding tab, and the corresponding counter-guiding installations have in each case one guiding leg that is guided in the guiding tab. Particularly preferably, the guiding installations are formed substantially by the respective guiding tabs, and the counter-guiding installations are formed substantially by the respective guiding legs.

A securing system according to the invention guarantees in a simple and stable manner a linear guide by way of which the respective neck band portion is pivotable about a fixed pivot axis. The curved displacement path is precisely established by the guiding leg. Both counter-guiding installations are preferably embodied as guiding legs which are at least in regions curved along an arc. Particularly preferably, the guiding legs along the entire length thereof are curved along the arc.

The guiding tabs can have a curvature that is adapted to the curvature of the guiding legs. The forehead band guiding legs can also have a curvature of this type.

It is a further object of the invention to improve a helmet for protecting the head of a helmet wearer. The helmet is in particular to fit in a secure and stable manner on the head of the helmet wearer.

This object is achieved by a helmet for protecting the head of a helmet wearer, in particular an occupational safety helmet, having

-   -   a helmet shell; and     -   a securing system according to the invention, which is attached         to the helmet shell.

The helmet has a helmet shell and a securing system, as has been described above, which is attached to the helmet shell. The helmet has a secure and stable fit on the head of the wearer. Further fastening means, in particular a chin strap, are preferably not necessary to this end. In principle however, it is also possible for an additional chin strap to be present. Further advantages of the helmet are derived from the advantages of the securing system referred to above.

A helmet of this type is in particular an occupational safety helmet. The helmet shell is preferably embodied as a hard shell. Additional internal shell tiers from soft PVC, or foam material, respectively, may be present but are not required. The helmet shell is preferably not padded.

The neck band portions of the securing system in an inwardly pivoted position are preferably stored within the helmet shell. On account thereof, helmets of this type can be easily stacked on top of one another.

A helmet, in which a forehead band of the securing system is fastened to the helmet shell by way of four anchoring elements, has a stable and secure fastening of the securing system to the helmet shell and simultaneously a flexible repositioning capability of the neck band portions. The fastening is in particular guaranteed so as to be uniform along the circumferential direction of the head of the helmet wearer. Two of the fastening elements can be disposed in the region of a front side of the helmet, and two further fastening elements can be disposed in the region of a rear side of the helmet.

The anchoring elements are preferably releasably connected to the helmet shell, in particular latched in a releasable manner. On account thereof, the securing system can be readily disassembled from the helmet and/or be replaced.

A preferred embodiment of the invention will be described hereunder with reference to the appended drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a perspective view of a helmet having a helmet shell and a securing system;

FIG. 2 shows a detailed illustration of an anchoring element for fastening the securing system to the helmet shell, according to a detail II in FIG. 1;

FIG. 3 shows a detailed illustration of a further anchoring element for fastening the securing system to the helmet shell, according to a detail III in FIG. 1;

FIG. 4 shows a perspective view of the securing system for the helmet according to FIG. 1;

FIG. 5 shows a lateral view of the securing system according to FIG. 4, wherein the securing system is shown lying flat and unfolded; and

FIG. 6 shows a detailed illustration of an adjustment mechanism for the securing system, according to a detail VI in FIG. 5.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Mutually corresponding parts in FIGS. 1 to 6 are provided with the same reference signs. Details of the exemplary embodiments explained in more detail hereunder can individually also represent an invention, or be part of a subject matter of an invention, wherein the invention is defined by the annexed claims.

FIG. 1 shows a perspective view of a helmet 1. The helmet 1 is an occupational safety helmet. Said helmet 1 has a helmet shell 2 and a securing system 3. The helmet shell 2 is embodied as a hard plastics-material shell. The head of a wearer of the helmet 1 is in particular in direct contact only with the securing system 3 but not with the helmet shell 2.

The securing system 3 is fastened to the helmet shell 2 by way of four anchoring elements 4 of which only two can be seen in the perspective view of FIG. 1. The remaining two anchoring elements 4, in relation to a central longitudinal axis of the helmet 1 that extends from the front side of the latter to the rear side thereof, to the anchoring elements 4 illustrated are disposed so as to be opposite the anchoring elements 4 illustrated. Two of the four anchoring elements 4 are disposed within the helmet shell 2, in the region of the front side of the helmet 1. The two further anchoring elements 4 are disposed within the helmet shell 2, in the region of a rear side of the helmet 1. The securing system 3 is fastened in a stable and reliable manner to the helmet shell 2 in a circumferential direction of a head of a helmet wearer.

One detailed illustration of an anchoring element 4 in the region of the front side, or the rear side, respectively, of the helmet 1 is shown in each of FIGS. 2 and 3. Each one of the anchoring elements 4 has a latching protrusion 5 which is mounted in a corresponding latching groove 6 that is configured in helmet shell 2. The latching protrusions 5 are secured in the respective latching grooves 6 by in each case one latching lever 7. The latching levers 7, as component parts of the helmet shell 2, are elastically molded to the latter. The latching connection to the latching protrusion 5 can be released by pushing the latching levers 7 out of the cross section of the respective latching groove 6, and the latching protrusion 5 can be slid out of the latching groove 6. The securing system 3 is releasably connected to the helmet shell 2 and can be removed from the latter in this way. The securing system 3 and/or the helmet shell 2 can be readily replaced or retrofitted, respectively, when required.

The anchoring elements 4 are in each case fastened to the securing system 3 by way of a latching connection. To this end, the securing system has two fastening pins 8 per anchoring element 4, said fastening pins 8 latching in corresponding pin receptacles of the anchoring elements 4 (not illustrated). In alternative exemplary embodiments (not illustrated), the anchoring elements 4 as component parts of the securing system 3 are molded so as to be integral to the latter.

Each anchoring element 4 furthermore has one tab 9. The tab 9 serves for fastening straps (not illustrated) as part of a helmet padding.

The securing system 3 removed from the helmet shell 2 is illustrated in FIGS. 4 to 6. For reasons of clarity, the anchoring elements 4 and an optionally associated helmet padding are not illustrated.

The securing system 3 comprises a forehead band 10 and two neck band portions 11, 12. The forehead band extends along a longitudinal direction 13. The neck band portions 11, 12 are disposed in the region of band ends of the forehead band 10 that are mutually opposite in terms of the longitudinal direction 13, and in the longitudinal direction 13 extend beyond the forehead band 10.

The neck band portions 11, 12 in the illustration of the securing system 3 lying flat and unfolded (=not assembled) in FIG. 5 are not connected to one another. The neck band portion 11 in said illustration is disposed in the region of a left band end of the forehead band 10, and the neck band portion 12 is disposed in the region of a right band end of the forehead band 10. The neck band portion 11 in the region of an end that faces away from the forehead band 10 has a latching clearance 14. A multiplicity of latching teeth 15 protrude into the latching clearance 14. The latching teeth 15 are molded so as to be integral to the neck band portion 11 and sit on a strip that delimits the latching clearance 14 toward the bottom. The neck band portion 12 has a corresponding latching clearance 16 having latching teeth 15 protruding into the latter. In the case of the latching clearance 16, the latching teeth 15 are disposed along two strips which delimit the latching clearance 16 toward the top, or toward the bottom, respectively.

For using the securing system 3 in the helmet 1, the neck band portions 11, 12 are connected to one another in a length-adjustable manner by way of a known blocking device 17, as is shown in FIGS. 1 and 4. The blocking device 17 has blocking teeth (not illustrated) which are guided in the latching clearances 14, 16 of the neck band portions 11, 12 and engage in the latching teeth 15. The effective length of the connected neck band portions 11, 12 can be varied by rotating an adjustment wheel 18.

The neck band portions 11, 12 in the assembly connected by the blocking device 17 form a neck band 19. The securing system 13 is therefore formed as an encircling headband composed of the forehead band 10 and the neck band 19. The longitudinal direction 13 of the forehead band 10 herein runs substantially along the circumferential direction of the head of a helmet wearer. When the securing system 3 is fastened in the helmet shell 2, the forehead band 10 is disposed in the region of the front side of the helmet 1, and the neck band 19 is disposed in the region of the rear side of the helmet 1. In the case of a correctly worn helmet, the forehead band 10 comes to lie on the forehead of the helmet wearer, while the neck band 19 by way of a contact element 20 disposed on the blocking device 17 bears so as to be approximately centric on the occiput of the helmet wearer.

The longitudinal direction 13 of the forehead band 10 in the assembled state of the securing system 3 runs in a forehead band plane. The securing system 3 is able to be adapted to the shape of the head of the helmet wearer in that the neck band portions 11, 12 are disposed on the forehead band 10 so as to be pivotable in relation to the forehead band plane. Moreover, the securing system 3 is able to be adapted to the circumference of the head of the helmet wearer by rotating the adjustment wheel 18 of the blocking device 17. The pivoting of the neck band portions 11, 12 will be explained in detail hereunder in the context of the description of the design embodiment of the forehead band 10 as well as the neck band portions 11, 12 and the relative disposal of said forehead band 10 and neck band portions 11, 12.

The neck band portions 11, 12 in the region of the free band end thereof that faces the forehead band 10 are in each case pivotably connected to the forehead band 10 by way of an articulated bearing 21. The articulated bearing 21 is embodied as an encapsulated-pin bearing. An articulation pin 22 which is molded so as to be integral to the forehead band 10 is mounted in a corresponding clearance in the region of the free end of the respective neck band portion 11, 12. The articulated bearing 21 defines in each case one pivot axis 23 about which the respective neck band portions 11, 12 can be pivoted in relation to the forehead band 10. The pivot axes 23 lie in particular in the forehead band plane.

Proceeding from the articulation pins 22, one forehead band lever arm 24 extends in each case along the longitudinal direction 13 in the direction of the respective neck band portion 11, 12. The forehead band lever arms 24 thus extend in the direction of the rear side of the helmet 1. The forehead band lever arms 24 are embodied so as to be integral to said forehead band 10.

A fastening protrusion 25 which extends substantially in the longitudinal direction 13 is in each case disposed on the free ends of the forehead band lever arms 24. The fastening protrusion 25 for fastening an anchoring element 4 has in each case two of the fastening pins 8. Fastening the forehead band 10 to the helmet shell 2 in the region of the rear side of the helmet 1 is thus possible by way of the rearwardly extending fastening protrusion 25.

The remaining fastening pins 8 are in each case disposed in pairs on fastening brackets 26 that extend in the direction of the helmet shell 2. The fastening brackets 28 in terms of the longitudinal direction 13 are disposed between the two articulated bearings 21. The fastening brackets 26 and the anchoring elements 4 that can be fastened thereto by way of the fastening pins 8 guarantee the fastening of the forehead band 10 to the helmet shell 2 in the region of the front side of the helmet 1. The fastening pins 8 for fastening the anchoring elements 4 to the securing system 3 are disposed exclusively on the forehead band 10. Therefore, only the forehead band 10 of the securing system 3, or the anchoring elements 4, is/are directly anchored to the helmet shell 2. By contrast, the neck band 19 having the neck band portions 11, 12 is not connected directly to the helmet shell 2. This guarantees simple pivoting of the neck band 19 out of the forehead band plane in relation to the helmet shell 2, the latter being connected to the forehead band 10. The securing system 3 is able to be adapted in a simple and flexible manner to the shape of the head of the helmet wearer.

One forehead band guiding leg 27 is in each case disposed beside the fastening protrusions 25, in the region of the free ends of the forehead band lever arms 24. The forehead band guiding legs 27 extend along an arc about the pivot axis 23, in a manner concentric with the latter, in the direction of the helmet shell 2. The forehead band guiding legs 27, when the helmet 1 is worn, extend upward along the arc. The forehead band guiding legs 27 at the upper ends thereof have in each case guiding tabs 28.

The guiding legs 27 having the guiding tabs 28, the fastening protrusions 25, the forehead band lever arms 24, the fastening brackets 26, and the further elements of the forehead band are integrally molded from plastics material. By contrast, the neck band portions 11, 12 are in each case discrete components which are likewise each integrally molded from plastics material.

The neck band portions 11, 12, proceeding from the free end thereof that faces the forehead band 10, initially run straight along a neck band lever arm 29. The neck band lever arms 29 from the articulated bearings 21 extend in each case substantially toward the rear. The neck band portions 11, 12, at an end of the neck band lever arms 29 that is opposite the articulated bearing 21, have a first elbowed bend 30. A first change in the direction of the profile of each of the neck band portions 11, 12 in the direction away from the helmet shell 2, that is to say substantially downward when the helmet is worn, takes place in the region of the first elbowed bend 30. An elbowed portion 31 which runs so as to be substantially perpendicular to the respective neck band lever arm 29 adjoins the first elbowed bend 30. A second elbowed bend 32 is molded on each neck band portion at an end of the elbowed portion 31 that is opposite the first elbowed bend 30. A second change in direction of the profile of the respective neck band portion 11, 12, opposite to the first change in direction, takes place at the second elbowed bend 32. From the second elbowed bend 32, each neck band portion 11, 12 runs straight to the respective band end which has the latching clearances 14, 16 and faces away from the forehead band 10. On account of the provision of the elbowed bends 30, 32, the neck band portions 11, 12 have in each case a substantially double-elbowed profile (that is to say a profile that is twice angled or deflected). This substantially double-elbowed profile has proven particularly suitable for adapting the securing system 3 to the shape of the head of the helmet wearer.

Each neck band portion 11, 12 in the region of the respective elbowed portion 31 has an integrally molded guiding leg 33. The guiding leg 33 is curved along an arc which runs so as to be concentric with the pivot axis 23, and extends in the direction of the helmet shell 2.

The length of the neck band lever arms 29, conjointly with the first elbowed bend 30, on the one hand, and the forehead band guiding legs 27, on the other hand, are mutually adapted in such a manner that the guiding legs 33 of the neck band portions 11, 12 are mounted so as to be displaceable in the guiding tabs 28 of the forehead band 10. The guiding tabs 28 represent a guiding installation, and the guiding legs 33 of the respective neck band portion 11, 12 represent a corresponding counter-guiding installation. Linear guides are formed by the guiding tabs 28 and the corresponding guiding legs 33. A displacement of the guiding legs 33 relative to the respective guiding tab 28 takes place along a displacement path 34 of the linear guide. The displacement path 34, like the respective guiding leg 33 and the respective forehead band guiding leg 27, runs along an arc which runs so as to be concentric with the respective pivot axis 23. The displacement path 34 can at least in regions also extend perpendicularly to the longitudinal direction 13.

The respective neck band portion 11, 12, when displacing one of the guiding legs 33 relative to the corresponding guiding tab 28 along the displacement path 34, in a pivoting direction 35 is pivoted about the respective pivot axis 23 in relation to the forehead band plane. The guiding of the guiding legs 33 in the corresponding guiding tabs 28 causes stable and precise pivoting.

In order for a respective pivoted position to be established, the guiding legs 33 have a plurality of latching cams 36 which can latch in a latching receptacle 37 of the respective guiding tab 28. The neck band portions 11, 12 and the entire neck band 19 are pivotable between the various pivoted positions defined by the latching cams 36 of the respective guiding legs 33.

The left neck band portion in FIG. 5 is shown in an inwardly pivoted terminal position. Moreover, an outwardly pivoted terminal position of the neck band portion 11 is illustrated in dashed lines. The neck band portion 11 in the inwardly pivoted terminal position is pivoted in the direction of the helmet shell 2, that is to say upward in the case of a worn helmet 1. The neck band portion 11 in the outwardly pivoted terminal position is pivoted out of the helmet shell 2, that is to say downward in the case of a worn helmet 1. In order for said terminal positions to be precisely defined, delimitation protrusions 38 are in each case present on the neck band portions 11, 12. The delimitation protrusions 38 are in each case molded in the region of the free end of the neck band portions 11, 12 that faces the forehead band 10. The delimitation protrusions 38 are in each case mounted between two detent elements 39 that are configured on the forehead band 10. Moreover, delimitation elements 40, 41 in the form of convexities are molded on the guiding legs 33. The delimitation elements 40 are in each case disposed on the free ends of the guiding legs 33, and the delimitation elements 41 are in each case disposed on the ends of the guiding legs 33 that face the respective elbowed portion 31. In the inwardly pivoted terminal position of a neck band portion 11, 12, the delimitation protrusion 38 impacts the lower detent element 39, and the delimitation element 41 impacts the guiding tab 28. In the outwardly pivoted terminal position, the delimitation protrusion 38 impacts the upper detent element 39, and the delimitation element 40 impacts the guiding tab 28.

The linear guides formed by the guiding legs 33 and the corresponding guiding tabs 28, by virtue of the forehead band lever arms 24, or the neck band lever arms 29, respectively, in terms of the respective pivot axes 23 are repositioned toward the rear in the longitudinal direction 13. The pivoting mechanism formed therefrom therefore does not impede a helmet wearer. The guiding tabs 28, by virtue of the forehead band guiding legs 27 that extend in the direction of the helmet shell 2, in a manner perpendicular to the longitudinal direction 13 of the forehead band 10 are spaced apart from the pivot axis 23. The guiding tabs 28 therefore do not impede inward pivoting of the respective neck band portion 11, 12 in a wide range. The neck band portions 11, 12 in the inwardly pivoted terminal position, and thus the entire neck band 19, are stored so as to be substantially completely within the helmet shell 2. This enables the helmets 1 to be stacked in a simple manner.

The securing system 3 permits optimal adapting to the shape of the head of the helmet wearer. The helmet 1 thus sits securely and at the same time comfortably on the head of the helmet wearer. An additional chin strap is therefore not mandatory. Nevertheless, there can be specific applications in which an additional chin strap is desired. The securing system 3 for fastening an additional chin strap has four hook elements 42. Two of the hook elements 42 are disposed on the forehead band 10, in each case so as to neighbor the articulated bearings 21 in the longitudinal direction 13. One further hook element 42 is in each case present on the elbowed portions 31 of the neck band portions 11, 12. The hook elements 42 are in each case T-shaped. Therefore, a chin strap can be easily hooked into the hook elements 42 by way of holding loops. 

In the claims:
 1. A securing system for securing a helmet on the head of a helmet wearer, the securing system comprising: a forehead band having two guiding installations; and two neck band portions having in each case one counter-guiding installation that corresponds to one of the two guiding installations of the forehead band, wherein each counter-guiding installation for repositioning the respective neck band portion in relation to the forehead band is disposed so as to be displaceable on the corresponding guiding installation, wherein the guiding installations are in each case disposed on a free end of a respective forehead band lever arm, wherein the forehead band lever arm, as a component part of the forehead band, extends in the direction of the respective neck band portion beyond a pivot axis about which the respective neck band portion is pivotable in relation to the forehead band, wherein the guiding installations are spaced apart from the pivot axis in a manner perpendicular to the longitudinal direction of the forehead band.
 2. The securing system as claimed in claim 1, wherein a displacement path by way of which at least one of the guiding installations is displaceable relative to the corresponding counter-guiding installation extends at least in regions so as to be perpendicular to a longitudinal direction of the forehead band.
 3. The securing system as claimed in claim 1, wherein a displacement path by way of which at least one of the guiding installations is displaceable relative to the corresponding counter-guiding installation runs at least in regions along an arc.
 4. The securing system as claimed in claim 1, wherein at least one of the two neck band portions is connected to the forehead band by way of an articulated bearing.
 5. The securing system as claimed in claim 4, wherein the articulated bearing is disposed on a free band end of the respective neck band portion that faces the forehead band.
 6. The securing system as claimed in claim 4, wherein the respective neck band portion in the region of the articulated bearing has a delimitation protrusion, wherein the delimitation protrusion is disposed between two detent elements that are configured on the forehead band.
 7. The securing system as claimed in claim 1, wherein at least one of the counter-guiding installations has counter-latching elements which engage in respective latching elements of the corresponding guiding.
 8. (canceled)
 9. The securing system as claimed in claim 1, wherein an anchoring element for fastening the securing system to a helmet shell is disposed in the region of the free end of at least one of the forehead band lever arms.
 10. (canceled)
 11. The securing system as claimed in claim 1, wherein the guiding installations are in each case embodied so as to be integral to the forehead band and/or the counter-guiding installations so as to be integral to the respective neck band portions.
 12. The securing system as claimed in claim 1, wherein at least one of the guiding installations has a guiding tab, and the corresponding counter-guiding installation has a guiding leg that is guided in the guiding tab.
 13. The securing system as claimed in claim 12, wherein the guiding leg is at least in regions curved along an arc.
 14. A helmet for protecting the head of a helmet wearer, the helmet, comprising: a helmet shell; and a securing system for securing a helmet on the head of a helmet wearer, the securing system comprising: a forehead band having two guiding installations; and two neck band portions having in each case one counter-guiding installation that corresponds to one of the two guiding installations of the forehead band, wherein each counter-guiding installation for repositioning the respective neck band portion in relation to the forehead band is disposed so as to be displaceable on the corresponding guiding installation, wherein the guiding installations are in each case disposed on a free end of a respective forehead band lever arm, wherein the forehead band lever arm, as a component part of the forehead band, extends in the direction of the respective neck band portion beyond a pivot axis about which the respective neck band portion is pivotable in relation to the forehead band, wherein the guiding installations are spaced apart from the pivot axis in a manner perpendicular to the longitudinal direction of the fore-head band, which securing system is attached to the helmet shell.
 15. The helmet as claimed in claim 14, wherein a forehead band of the securing system is fastened to the helmet shell by way of four anchoring elements.
 16. The helmet according to claim 14, wherein the helmet is configured as an occupational safety helmet 